Immutable Existence.

The servant is immune to any spell or effect that would alter its form or send it to another plane of existence.

Magic Resistance.

The servant has advantage on saving throws against spells and other magical effects, and spell attacks made against it have disadvantage.

Regeneration.

The servant regains 10 hit points at the start of its turn. If it is reduced to 0 hit points, this trait doesn't function until an attuned creature spends 24 hours repairing the artifact or until the artifact is subjected to lightning damage.

Standing Leap.

The servant's long jump is up to 50 feet and its high jump is up to 25 feet, with or without a running start.

Unusual Nature.

The servant doesn't require air, food, drink, or sleep.

Actions

Destructive Fist.

Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 36 (4d12 + 10) force damage. Or Ranged Weapon Attack: +17 to hit, range 120 ft., one target. Hit: 36 (4d12 + 10) force damage. If the target is an object, it takes triple damage.

Crushing Leap.

If the servant jumps at least 25 feet as part of its movement, it can then use this action to land on its feet in a space that contains one or more other creatures. Each of those creatures is pushed to an unoccupied space within 5 feet of the servant and must make a DC 25 Dexterity saving throw. On a failed save, a creature takes 26 (4d12) bludgeoning damage and is knocked prone. On a successful save, a creature takes half as much damage and isn't knocked prone.

Mighty Servant of Leuk-o